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From: johnl@iecc.cambridge.ma.us (John R. Levine)
Newsgroups: comp.dcom.telecom
Subject: Re: USA to UK Telco Link
Message-ID: <16252@accuvax.nwu.edu>
Date: 21 Jan 91 18:00:11 GMT
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X-Telecom-Digest: Volume 11, Issue 43, Message 11 of 12


In article <16095@accuvax.nwu.edu> lars@spectrum.cmc.com (Lars
Poulsen) writes:

>>I have heard that American modems and European modems operate by a
>>different set of rules, ...   Is this true?

>Yes. 

Well, sort of.  As noted, 2400bps and higher are the same everywhere
except for the various proprietary 9600bps versions that proliferated
before V.32 became cheap enough to be popular.  For 1200bps modems,
the U.S. "Bell 212" and international CCITT schemes are pretty close
except for differences in the initial handshake.  Hayes modems and
most clones have a B command that make the modem switch from the
default 212 mode to the CCITT mode.


Regards,

John Levine, johnl@iecc.cambridge.ma.us, {spdcc|ima|world}!iecc!johnl